We did not file a joint taxes last year. Also I claimed I was his dependent that was why i did not receive my stimulus. I want to file joint this year and recieve his credit for stimulus.
When you file your tax return this year, you will be asked to enter how much stimulus money you received. If any additional stimulus payment is due you it will be applied to this year's tax return.
The stimulus check is an advance on a credit you can receive on your 2020 tax return. If something went wrong or you did not get the stimulus check in 2020, you can get it when you file your 2020 return in early 2021 The Recovery Rebate Credit will be found in the Federal Review section
https://ttlc.intuit.com/community/tax-topics/help/how-will-the-stimulus-package-impact-me/00/1393859